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4 LOOK. I No. 299,805.l Patented Jun-e 3, 1884.-

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UNITED STATES PATENT EEICE.,

' JOHN J. KNA'IDP, or HIGHLAND, wEs'r VIRGINIA.

LOCK.

SPECIFICATION forming part of Letters Patent No. 299,805, dated June 3,1884'.

Application tiled March 17, 1884) (No model.)y

To all whom t may concern: p

Be it known that I, JOHN J. KNAPP, a citizen of the United States,residing at Richland, in the county of Greenbrier and State of WestVirginia, have invented a new and useful Loek, of which the following isa specification, reference being had to the accompanying drawings.

rlhis invention has relation to improvements in door and other locks;and it consists in the novel construction and arrangement of parts, aswill be hereinafter fully described, and particularly pointed out in theclaim.

Figure 1 is a vertical longitudinal sectional view showing theinternalmechanism of the lock in elevation, and Fig. 2 is a perspective view ofthe spring for preventing the key from falling out of the k-ey-hole andoperating the dog that holds the bolt to its adjustments.

Referring by letter to the accompanying drawings, a designates thelock-case; b, the bolt; c, the pivoted dog that holds the bolt to itsadj ustments;l d, the guide-stud for the bolt;

, e, the spring that holds the key kin the keyhole and prevents it fromfalling out, and at the same time bears against the short arm fof thepivoted dog to cause it to appropriately engage the bolt to hold iteither sprung or withdrawn, as the case may be., The springlever e ismade of spring-wire coiled at h,

. to form a bearing and furnish the necessary tension to operate itsarms i and k, which eX- tend at right angles from the 'coiledtensionbearing h. The arm k of the spring e is p rovided near its freeend witha downward bend, l, which, when the spring is in place on thefulcral stud m, bears against the lower end of the key-guard and holdsthe key in the keyhole, and not only prevents it from falling out, butholds it in a normal position after it has been turned to throw thebolt, lready to throw the bolt in either direction. The arm fi of thespring-lever bears against the short arm of the dog c and holds it inengagement with the bolt, so that thet spring-lever e has a triplefunction. The stop or pin n prevents the spring from obstructing thekey-hole when Ait is desired to insert and remove the key. The pressureof the bend on the key-guard is sufficient to hold the key in place, butat the same time permits it to be designedly removed when necessary.

' The device is cheap and simple, and is eiicicnt for the purposes forwhich it is intended. The bend in the horizontal arm of theA springleverd oes not interfere with the turning of the key to throw the bolt, asthe spring yields to the lower end of the guard when the key is turned.

Having thus fully described my invention, what l" claim as new, anddesire to secure by Letters Patent of the United States, is

In a lock, the combination, with the bolt and pivoted dog engaging thebolt, of the springlever having the coil tension-bearing secured upon afulerum-post within the lock-case, and having one of its arms engagingthe short arm of the p ivoted dog, and the other arm provided with abend for engaging the lower end 'of the key-guard, and a stop-pin forpreventing the latter arm from obstructing the keyhole, substantially asspecified.

In testimony that l claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

JOHN J. KNAPP.

